Abrading-cylinder



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J. L. PERRY.

ABRADING CYLINDER. NO. 285.666. Patented Sept.- 25; 1883'.

n. PEYERS PhaloLilhognphor, Wahmgmn. n. c

UNITED STATES PATENT OFFICE.

JAMES L. PERRY, OF BERLIN, VVISGONSIN.

ABRADlNG-CYLINDER.

SPECIFICATION forming part of Letters Patent No. 285,666, datedSeptember 25, 1883.

Application filed June 20, 1683. (No model.)

10 will be fully described hereinafter.

In the drawings, Figure 1 is an end view of my improved abrader. Fig. 2is a side view of a section of the same. Fig. 3 is a side view of anentire cylinder, and Fig. 4c is an end View I 5 of a portion broken awayfrom a cylinder and showing a modification of my invention.

A is the body of my abradenhead, which is constructed of the besttool-steel, and this cylinder is milled out at regular intervals to form20 ridges A, and these ridges are in turn grooved transversely, as shownin Fig. 2, to form teeth a, and from the point of the teeth back to therear of each ridge is beveled, as shown in Figs. 1 and 4:, so that onlythe forward edges of the 2 5 teeth may enter the material to be dressed.

I make the abrader-head as follows: I take a perfect cylinder and threadit just as an ordinary screw-bolt is threaded, and I then mill out thesurface to formthe ridges A, after which 0 I reduce the rear portion ofthe teeth a to make their points prominent, as before stated. As theteeth are formed by sp i rally grooving the cylinder, it will beperceived that after the ridges have been made the teeth on one ridge 35 will make an entirely different cut from those made by the teeth 011any other ridge. For instance, if there be twelve teeth to the inch andnine ridges on the cutter-head, aboard passed over the cutter-head willreceive one hundred 40 and eight cuts to the inch, and each cut will beout of line with those preceding it; and therefore my abrader will havethe combined I effect of a planer and sand-paper roll in reduc ing thematerial to an even surface and thickness, but will not, like a planer,be liable to 45 split up the board or tear the material oper' ated upon,such as crossgrain wood. Each of the grooves that separate the ridgesextends beneath the face of a ridge to give play to the sharpening-tool,and the faces of the teeth are 5( all made 011 the same incline, so thatwhen the teeth are sharpened the circumference of the head will bereduced uniformly, and it will only be necessary to slightly raise thehead and its bearing to make it produce the same 51 depth of cut that itmade before sharpening.

Instead of making the ridges integral with the head, I may make dovetailchannels along its length, and providing ridges or knives, as shown inFig. 4:, insert them in the channels 6 and hold them in place by widewashers slipped onto the shaft before the nuts I) b are screwed intoplace.

My cutter-head is made preferably in sections, as shown in the drawings,which sections 6 are held together on the shaft by the nuts I), and theridges are preferably made slightly diagonal, so that they will have ashearing action, and even if the teeth on the head are omitted the sameeffect will be produced by the shearblades, but in a minor degree.

\Vhatl claim as new, and desire to secure by Letters Patent, is-

' The cutter -head consisting of a series of ridges having teeth, acontinuation of which 7 would form a screw-thread about the entireperiphery of the head, as set forth.

In testimony that I claim the foregoing I have hereunto set my hand, onthis 31st day of May, 1883, in the presence of two witnesses. &

JAMES L. PERRY.

Witnesses: I

STANLEYS. Srour, H. G. Unnnnwoon.

